Its clearly showing that theve put stress on the following things and you must not give less stress on providing them with the stuffs :
They radomly call people in interviews, I have seen interviews are relatively easier and they give you ample amount of time to answer the questions and if you want more time to provide them with any paper during the interview, they set up another date for that.
Read this page: See how easier the interview is. They want these things to make sure, that you have current fund which must be unencumbered, your salary record-- if youre asked anything that is tough to answer, just reply that salary matters are solely dealt by your HR and Accounts department- they know better, and you need to ask them about the asked issue.
See this link: http://www.canadavisa.com/canada-immigration-discussion-board/all-bangladeshi-applicants-forum-t19664.60.html
Good luck, let us knw what happens in the Interview.